22180835440 has 20 divisors (see below), whose sum is σ = 51570442584. Its totient is φ = 8872334144.

The previous prime is 22180835399. The next prime is 22180835447. The reversal of 22180835440 is 4453808122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 22180835440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180835447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138630142 + ... + 138630301.

Almost surely, 2^22180835440 is an apocalyptic number.

22180835440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22180835440 is an abundant number, since it is smaller than the sum of its proper divisors (29389607144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22180835440 is a wasteful number, since it uses less digits than its factorization.

22180835440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277260456 (or 277260450 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The spelling of 22180835440 in words is "twenty-two billion, one hundred eighty million, eight hundred thirty-five thousand, four hundred forty".